ghosting

when you are in a relationship with a girl and it just happens that the girl is no longer interested in you then it's called Ghosting.

The act of suddenly ceasing all communication with someone the subject is dating, but no longer wishes to date. This is done in hopes that the ghostee will just “get the hint” and leave the subject alone, as opposed to the subject simply telling them he/she is no longer interested. Ghosting is not specific to a certain gender and is closely related to the subject’s maturity and communication skills. Many attempt to justify ghosting as a way to cease dating the ghostee without hurting their feelings, but it in fact proves the subject is thinking more of themselves, as ghosting often creates more confusion for the ghostee than if the subject kindly stated how he/she feels.

I did experienced this type of problem when hooking up with a girl, well sometime one's expectation is different from what it'd turn out to be.